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- (No Model.)

J. W. TERM'AN.

SAFETY STOP FOR MINING GAGES, &c. No. 341.522 Patented May 11, 1886.

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UNITED STATES PATENT OFFICE.

JAMES W. TERMAN, OF DES MOINES, IOXVA, ASSIGNOR OF THREE-FOURTHS TO H. S. BUTLER, OF SAME PLACE.

SAFETY-STOP FOR MINING-CAGES, 80C.

SPECIFICATION forming part of Letters Patent No. 341,522, dated May 11, 1886,

Application filed June 1, 1885.

To all whom it may concern Be it known that I, JAMES W. TERMAN, a citizen of the United States of America, and a resident of Des Moines, in the county of Poll;

and State of Iowa, have invented an Lnproved Safety-Stop for Mining-Cages, &c., of which the following is a specification.

My object is to prevent the dangers and accidents, damages, and loss of life incident to the falling of cages in mining-shafts and platforms in elevators.

My invention consists in the arrangement and combination of eccentrics, levers, and weights with a cage, as hereinafter set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which- Figure 1 is aside view of a cage, in position between two posts, to which my device is attached, as required, for practical use. Fig. 2 is a side view, and Fig. 3 an end view, of one of the eccentrics. Fig. 4 is a side view, and Fig. 5 an edge view, of one of the weights.

A A represent wooden posts fixed in parallel and perpendicular positions.

B is the top cross-piece of a cage, adapted to slide up and down between the posts.

G O are metal plates fixed to the opposite ends and opposite sides of the cross-pieces B, to project over the side faces of the posts to retain the cage in perpendicular position between the posts.

D D are curved metal plates fixed to the opposite sides and opposite ends of the cross piece B.

G G are eyes at the top ends of the central bars of an iron frame that supports the platform or bottom of the cage.

Screw-bolts H are passed through the plates D and eyes G, and short chains J extended from the same bolts to the rope or chain K, that extends to a drum at the tops of the posts.

L L are eccentrics pivoted between the curved plates or bearers D by means of jonn nals that extend from their ends.

M M are levers fixed to thejournals of the eccentrics by means of keys, or in any suitable way. Adjustable weights N, having openings to admit the ends of the levers, are slipped over the free ends of the levers and fixed thereto by means of set-screws.

P is a perforated plate, through which the rope K is passed.

A shoulder formed of the Serial No. 167,175. (No model.)

loop at the end of the rope supports the plate and short chains R, connected with the ends of the plate, and the ends of the levers retain the levers and weights elevated and the eccentrics from contact with the posts A and my complete device in a normal condition that adapts it to move up and down with the cage,

as required, to be always in readiness to arrest the falling of thecage when the rope K is accidentally slackened or broken, so as to allow the weights to descend, and, by means of the levers to which they are attached, to instantly press the serrated faces of the eccen- 55 trics against the posts A.

I am aware that eccentrics have been used in safety stops of various forms; but my manner of constructing elongated eccentrics and combining levers and weights therewith in such a manner that they will be automatically operated, whenever necessary to arrest the descent of a cage, by firmly grasping the broad faces of the posts, against which they are pressed by the weighted levers, is new and greatly advantageous.

I am aware that pairs of eccentrics have been combined with the opposite sides of a cage, to engage the opposite sides of guide rails or posts to arrest the descent of the cage So whenever the hoisting rope or chain combined therewith was slackened or broken; but my manner of arranging and combining single eccentrics with the opposite sides of a cage and a hoisting rope to engage parallel posts produces a more simple and less costly safety device that is equally effective and less liable to get out of order than the complicated and more expensive devices in which two pairs of eccentrics are used.

I therefore claim as my invention- Two eccentrics, L, two levers, M, each carrying anadjustable weight, N, the perforated plate P, connected with the ends of the levers M by means of chains R, a rope or chain, K, 5 two chains, J, arranged and combined relative to each other, the top of a miners cage, and parallel guideposts A, substantially as shown and described, to operate in the manner set forth, for the purposes stated.

JAMES \V. TERMAN.

Witnesses:

O. D. HUDGINS, Tnonas G. ORWIG. 

